Lead Dimensional Engineer — SPARC Program

Commonwealth-Fusion-Systems-5; Harvard (MA); On-site; USD 130,000 - 200,000; Full time

Benefits offered by this job

Equity

13 Company-wide Holidays

Flexible vacation days

Health, dental, and vision insurance

401(k) with employer matching

Professional growth opportunities

Team-building activities

Job summary

Commonwealth Fusion Systems is seeking a Staff Dimensional Engineer for SPARC to own dimensional management across HTS magnet production. You will define GD&T, datum strategy, and verification methods, ensuring buildable, verifiable hardware and proper inspection requirements.

You will guide tolerance analysis on large assemblies, coach inspectors and engineers, review ECNs for dimensional impact, and travel as needed.

Qualifications

• BS in Mechanical, Industrial, Materials Science, Manufacturing, or Aerospace Engineering required.
• 10+ years of dimensional engineering experience on complex hardware.
• Mastery of GD&T (ASME Y14.5) as author and reviewer; GDTP certification preferred.
• Experience with 1D RSS and 3D variation analysis tools (3DCS/VisCA).
• Ability to translate design intent into inspection requirements and criteria.

Responsibilities

• Set GD&T and datum strategy in partnership with Engineering; translate design intent into tolerancing.
• Perform tolerance stack-up and 3D variation analysis on large assemblies.
• Architect inspection requirements for large components and assemblies.
• Drive identification and flowdown of key characteristics from top-level requirements.
• Support disposition of Non-Conformance with dimensional analysis and decisions.
• Review engineering change packages for dimensional impact during SPARC assembly.
• Coach QC Inspectors and Design Engineers on GD&T and dimensional practice.

Skills

Dimensional engineering

GD&T expertise

Tolerance analysis

3D variation analysis

Inspection requirements

Communication skills

Education

BS in Mechanical/Industrial/Materials Science/Manufacturing/Aerospace Engineering

Tools

3DCS

VisVA

MS Excel

Minitab/JMP

GDTP certification

GD&T authoring

Job description

Commonwealth Fusion Systems is seeking a Staff Dimensional Engineer for SPARC to own dimensional management across HTS magnet production. You will define GD&T, datum strategy, and verification methods, ensuring buildable, verifiable hardware and proper inspection requirements.

You will guide tolerance analysis on large assemblies, coach inspectors and engineers, review ECNs for dimensional impact, and travel as needed.